With the continuous development of science and technology and constantly improve of the quality of life, most people are increasingly aware of the importance of the environment. According to the serious problem that r...With the continuous development of science and technology and constantly improve of the quality of life, most people are increasingly aware of the importance of the environment. According to the serious problem that resource consumption and environmental pollution caused by the traditional building materials, green building materials has been the support of the people. Because of its low consumption, less pollution, beneficial to human health, harmony with the environment and other excellent performance, the green building materials has a rapid development in recent years. This paper is based on the thinking of innovation, starting from the environment, energy saving point of view, analysis the advantages and shortcomings of green building materials, explore the developing trend and future of this new type of material.展开更多
Bond behavior of corroded reinforcement in concrete wrapped with carbon fiber reinforced polymer (CFRP) under cyclic loading is experimentally investigated. An electrolyte corrosion technique is used to accelerate the...Bond behavior of corroded reinforcement in concrete wrapped with carbon fiber reinforced polymer (CFRP) under cyclic loading is experimentally investigated. An electrolyte corrosion technique is used to accelerate the corrosion of the steel bar in cylindrical concrete specimens. Wrapped specimens are strengthened with one layer of CFRP after the reinforcements are corroded. The experimental parameters investigated include: corrosion level, CFRP wrapped and number of loading cycles. Test results indicate that bond strength and area of hysteretic curve of CFRP wrapped specimens are larger than those of the unwrapped specimens. With increasing the number of loading cycles, the bond strength and area of hysteretic curve decrease gradually, especially at the 1st cyclic loading. The CFRP wrapping reduces the bond degradation rate effectively and prevents the bond-splitting failure of the corroded concrete specimens.展开更多
文摘With the continuous development of science and technology and constantly improve of the quality of life, most people are increasingly aware of the importance of the environment. According to the serious problem that resource consumption and environmental pollution caused by the traditional building materials, green building materials has been the support of the people. Because of its low consumption, less pollution, beneficial to human health, harmony with the environment and other excellent performance, the green building materials has a rapid development in recent years. This paper is based on the thinking of innovation, starting from the environment, energy saving point of view, analysis the advantages and shortcomings of green building materials, explore the developing trend and future of this new type of material.
基金the National Natural Science Foundation of China (No. 50708059)the Graduate Student Research and Innovation Program of Shanghai Jiaotong University (No. TS0220701001)
文摘Bond behavior of corroded reinforcement in concrete wrapped with carbon fiber reinforced polymer (CFRP) under cyclic loading is experimentally investigated. An electrolyte corrosion technique is used to accelerate the corrosion of the steel bar in cylindrical concrete specimens. Wrapped specimens are strengthened with one layer of CFRP after the reinforcements are corroded. The experimental parameters investigated include: corrosion level, CFRP wrapped and number of loading cycles. Test results indicate that bond strength and area of hysteretic curve of CFRP wrapped specimens are larger than those of the unwrapped specimens. With increasing the number of loading cycles, the bond strength and area of hysteretic curve decrease gradually, especially at the 1st cyclic loading. The CFRP wrapping reduces the bond degradation rate effectively and prevents the bond-splitting failure of the corroded concrete specimens.
